Why will your vehicle speed naturally increase on downgrades?

The increase in vehicle speed on downgrades is primarily due to gravity. When a vehicle is on a downhill slope, the force of gravity pulls it downwards, resulting in acceleration. This phenomenon is influenced by Newton's laws of motion, where an object's weight and the incline of the hill come into play.

As gravity acts on the vehicle, it pushes the vehicle down the slope, overcoming any resistance the tires may have with the road surface and leading to an increase in speed. The steeper the downhill grade, the more pronounced this effect can be, making it necessary for drivers to manage their speed appropriately to maintain control of the vehicle.

While factors such as engine resistance and traction play roles in vehicle performance, they do not directly cause the speed increase associated with downgrades like gravity does.